Tire-Pressure Monitor Automatic Sensor ID Rewriting
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Solution Overview
Problem
Existing tire-pressure monitor systems require manual user intervention for sensor ID rewriting during tire replacements, leading to user unfriendliness and potential forgetfulness, and existing automatic registration systems take too long to register correct sensor IDs, causing driver inconvenience.
Innovation Solution
A tire-pressure monitor system with a vehicle body side device that measures continuous unreceived periods for each sensor ID, reports malfunctions when thresholds are exceeded, and automatically rewrites sensor IDs when total unreceived periods indicate simultaneous wheel sensor replacements, thereby reducing driver inconvenience and ensuring timely registration.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If manual user intervention is required for sensor ID rewriting during tire replacements, then the system can ensure accurate sensor ID registration, but the ease of operation deteriorates due to user unfriendliness and potential forgetfulness
Solution Approach 1:
The system performs automatic sensor ID rewriting without requiring manual user intervention. The vehicle body side device autonomously detects when tire replacement has occurred and automatically rewrites the sensor IDs, allowing the system to serve itself rather than requiring user action.
Solution Approach 2:
The manual mechanical process of users physically replacing tires and then manually rewriting sensor IDs is replaced by an automated electronic system that detects tire replacement conditions and automatically performs the ID rewriting through electronic communication with the wheel sensors.
2Ease of operation
If automatic sensor ID registration is implemented, then the ease of operation improves by eliminating manual intervention, but the time required for registration increases causing driver inconvenience
Solution Approach 1:
The system performs sensor ID rewriting in advance during the tire replacement process itself, rather than waiting until after the replacement is complete. By detecting the tire replacement condition and automatically rewriting IDs during this period, the system eliminates the need for separate registration time that would otherwise be required.
Solution Approach 2:
The system maintains continuous monitoring and processing during the tire replacement period, automatically detecting the replacement condition and continuously attempting to rewrite sensor IDs without interruption, thereby eliminating idle registration time.
3Measurement precision
If the system monitors each sensor ID separately for malfunction detection, then the measurement precision improves for identifying specific wheel issues, but the device complexity increases due to multiple monitoring operations
Solution Approach 1:
The system merges the monitoring operations for multiple sensor IDs into a unified processing framework. By combining the detection and rewriting operations for all four wheel sensors into a single integrated system, the complexity is reduced while maintaining the ability to identify specific wheel issues through the unified monitoring approach.
Data Source
AI summary
[Objective] Unreceived malfunction should be prevented from being reported, at the time of a set replacement of tires.[Means for Solution] About each registered sensor ID, the unreceived malfunction judging portion 56 outputs a malfunction signal to the notification controller 53, when an unreceived period exceeds first setup time Tref1. The total unreceived period calculation portion 57 outputs a self-vehicle ID discrimination initiation instruction to ID discrimination/rewriting portion, when the sum total unreceived period Ttotal which is the sum total of the unreceived period of each registered sensor ID is calculated and the sum total unreceived period Ttotal exceeds second setup time Tref2. Before an unreceived period exceeds first setup time Tref1, registered sensor ID is rewritten and it can avoid reporting unreceived malfunction to a driver by this.